Worksheets1-50 анг
Total questions: 50
Worksheet time: 25mins
Mechanical movement
change the mutual arrangement of bodies or parts of them relative to each other in space with time
The aggregate of bodies, in relation to which the position is determined by the material point
length section of the trajectory traveled by a material point from the start of the countdown
the set of bodies, allocated for consideration
Mechanical system
changing a relative positioning of bodies or their parts relative to each other in space over time
the aggregate of bodies identified for consideration
the set of bodies, which is determined by the position of a material point
line, which describes the material point in space
Reference system
changing a relative positioning of bodies or their parts relative to each other in space over time
the set of bodies identified for consideration
the aggregate of bodies, which is determined by the position of a material point
change the radius-vector of a moving point during the time period
Trajectory
the set of bodies, which is determined by the position of a material point
the length of the trajectory traveled by a material point since the start of the countdown
changing a relative positioning of bodies or their parts relative to each other in space over time
the line which describes the material point in space
Moving
the change of the radius vector of a moving point during the time period
the set of bodies, which is determined by the position of a material point
the length of the trajectory traveled by a material point since the start of the countdown
changing a relative positioning of bodies or their parts relative to each other in space over time
The way
the set of bodies, which is determined by the position of a material point
the length of the trajectory traveled by a material point since the start of the countdown
changing a relative positioning of bodies or their parts relative to each other in space over time
line, which describes the material point in space
Give determine of moving
projection of a vector on coordinate axis
single modulo vectors
the vector drawn from the initial position of the particle in its final
the vector drawn from the origin to the given point
The radius-vector
single modulus and perpendicular vectors
single modulo vectors
projection of a vector on coordinate axis
the vector drawn from the origin to the given point
Which of the examples is a mechanical system
a swarm of gnats.
the Solar system.
a Horse pulling a cart.
the Earth and Moon.
A material point
body weight which in the conditions of the given problem can be neglected
a body which sizes in the conditions of the given problem can be neglected
the body, a charge which the conditions of the given problem can be neglected
single modulus and perpendicular vectors
Speed detection
dr/dt
ds/dt
s/t
at
Determination of the speed module
s/t
ds/dt
at
dr/dt
Determination of the average value of speed
s/t
0
r12/t2-t1
ds/dt
Determination of the average value of the speed module
ds/dt
s/t
dr/dt
0
Acceleration
dv/dt
dr/dt
d2v/dt2
|dv/dt|
Formula of acceleration
dr/dt
d2v/dt2
d2r/dt2
|dv/dt|
The motion is called rectilinear if
eu=const
an=0
ar=0
v=const
The motion is called rectilinear ifI’m
an=0
v=const
ar=0
0
The motion is called curvilinear if
an=0
v=const
ar=0
The motion is called curvilinear if
ar=0
v=const
Newton's first law:
F=0; v=const
F12=-F21
dL/dt=M
dp/dt=F
Newton's second law:
dp/dt=F
F12=-F21
F=0, v=const
dL/dt=M
Newton's third law:
dp/dt=F
dL/dt=M
F12=-F21
F=0, v=const
Hooke's Law for spring
Fупр.=kx
Fупр.х=kx
Fупр.=-kx
Fвнеш=-kx
Determination of the pulse
[r p]
mv
[r F]
mv2/2
Determination of the kinetic energy
mv
[r p]
Fdr
mv2/2
Determination of the angular momentum
[r p]
mv2/2
mv
F dr
Definition of moment of force
[r p]
mv
mv2/2
[r F]
The definition of the unit work
F dr
mv2/2
mv
[r p]
The measure of inertia of the body when the forward movement
the moment of inertia
mass
the power
momentum
The measure of the intensity of interaction of bodies
the moment of inertia
power
mass
momentum
The reference frame is inertial if Elevator
Rises evenly upwards.
Rises slowly upwards.
Rises rapidly upwards.
falls Freely.
The Coriolis force is determined by the expression
mω2R
2m[ω’v]
2m[v’ω]
mωR
The centrifugal force of inertia
mω2R
2m[ω’v]
2m[v’ω]
mωR
Specify which of these interactions: 1. gravity, 2. elastic, 3. electromagnetic, 4. weak, 5. molecular, 6. strong (nuclear) are fundamental
1,3,4,6
1,3,5,6
1,2,3,6
1,2,3,4
The weight of the body, moving with acceleration, up
m(g-a)
m(g+a)
mg
ma
Cosmic velocity-second
√2gR3
√gR3
√2gH
√2gM3
The first cosmic velocity
√2gR3
√3gR3
√2gH
√gR3
Forces are called conservative if
they do not depend on path
their work depends on path
their work depends on the speed of movement
they do not depend on the speed of movement
How to change the potential energy of a body in a gravity field if its height above the ground decreased in 2 times?
will decrease in 2 times
will increase in 2 times
will decrease 4 times
increase 4 times
The most common definition of potential energy corresponds to the statement:
energy of a body raised above the Ground
the energy of interaction of the bodies depend on their relative position
the gravitational interaction energy
elastic energy
The time derivative of angular momentum of a closed system is equal
0
Radius-vector of center of mass
The moment of inertia of a material point
R2dm
mr2
mD2/2
mR2
The moment of inertia of the body
R2dm
mr2
mD2/4
mR2
The kinetic energy of a rotating body
Ιω
Iω2/2
Ια
L2/2
The body's kinetic energy in planar movement
The law of conservation of mechanical energy States
the total mechanical energy of a closed system of material points remains constant
the total mechanical energy of a closed system of material points, between which there are only conservative forces, remains constant
the total mechanical energy of a system of material points, between which there are only conservative forces, remains constant
the total mechanical energy of a system of material points remains constant
The law of conservation of energy States
the total mechanical energy of a system of material points, between which there are only conservative forces, remains constant
the total mechanical energy of a system of material points remains constant
the total mechanical energy of a particle moving in a conservative field of forces remains constant
the total mechanical energy of a closed system of material points remains constant
The law of conservation of mechanical energy States
the total mechanical energy of a system of material points under the action of only conservative forces is constant
the total mechanical energy of a system of material points remains constant
the total mechanical energy of a system of material points, between which there are only conservative forces, remains constant
the total mechanical energy of a closed system of bodies remains constant
